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Which multiplication expression is equal to [tex]$\frac{3}{4} \div \frac{1}{3}$[/tex]?

A. [tex][tex]$\frac{4}{3} \times \frac{1}{3}$[/tex][/tex]
B. [tex]$\frac{3}{4} \times \frac{3}{1}$[/tex]
C. [tex]$\frac{4}{3} \times \frac{3}{1}$[/tex]
D. [tex][tex]$\frac{3}{4} \times \frac{1}{3}$[/tex][/tex]

Sagot :

To determine which multiplication expression is equal to [tex]\(\frac{3}{4} \div \frac{1}{3}\)[/tex], let's follow the steps for dividing fractions and converting it into a multiplication problem.

When we divide by a fraction, we multiply by its reciprocal. So, let's determine the reciprocal of [tex]\(\frac{1}{3}\)[/tex], which is [tex]\(\frac{3}{1}\)[/tex].

Now, rewrite the expression [tex]\(\frac{3}{4} \div \frac{1}{3}\)[/tex] as:

[tex]\[ \frac{3}{4} \times \frac{3}{1} \][/tex]

Next, we need to compare this multiplication to the given options.

- Option A: [tex]\(\frac{4}{3} \times \frac{1}{3}\)[/tex]
\[\frac{4}{3}\) is not equal to [tex]\(\frac{3}{4}\)[/tex], so this option is incorrect.

- Option B: [tex]\(\frac{3}{4} \times \frac{3}{1}\)[/tex]
This matches our derived multiplication expression perfectly, so this option is correct.

- Option C: [tex]\(\frac{4}{3} \times \frac{3}{1}\)[/tex]
[tex]\(\frac{4}{3}\)[/tex] is not equal to [tex]\(\frac{3}{4}\)[/tex], so this option is incorrect.

- Option D: [tex]\(\frac{3}{4} \times \frac{1}{3}\)[/tex]
This does not match [tex]\(\frac{3}{4} \times \frac{3}{1}\)[/tex], so this option is incorrect.

Therefore, the correct multiplication expression that is equal to [tex]\(\frac{3}{4} \div \frac{1}{3}\)[/tex] is:

Option B: [tex]\(\frac{3}{4} \times \frac{3}{1}\)[/tex].